WXtoImg: software to decode APT and WEFAX signals from weather satellites Escalation. This week in Developmental Psychology class I presented a paper on dating violence in teenage relationships. I'm not going to rehash the paper here, because it's boring and Google-vulnerable, but I wanted to share the most interesting conclusion I found. How much conflict there is in a relationship, or the seriousness of the conflict issues, are not predictors of whether there will be violence. The biggest predictor is the degree to which conflicts in the relationship escalate. The studies I read looked at dating violence, which is not the same thing as dating abuse, although obviously there's lots of overlap. Dating violence simply means that there's hitting/shoving/slapping; emotional abuse and controlling behavior aren't factored in. The takehome is that we shouldn't be teaching teenagers (and grownups) to avoid conflict. De-escalation means bringing someone down from an irrational, emotionally hyperaroused, screamy-hitty state, but it does not mean appeasement. •Project calmness.
RF - CML Microcircuits - Building Blocks Applications: Data over radio: MSK, FSK, GMSK, QPSK, QAM Wideband modulation systems up to 50MHz Linear and non-linear modulation schemes Wireless telemetry Marine AIS systems Software Defined Radio (SDR) Satellite terminals Digital TV - CATV mod. Wi-Max implementations Analogue, digital and multimode radio: TETRA, APCO, dPMR, DMR, PDT CML's range of Radio Frequency (RF) products provides a selection of modular building blocks for implementation as part or all of the 'wireless front-end' of a wide range of constant and non-constant envelope modulation systems. The new RF Building Block range is designed to provide flexible, high-performance ICs required for HF/VHF/UHF professional radios, wireless data terminals, wireless microphones and marine and avionics radio systems. CML's RF devices are designed for use in a wide range of both narrowband and wideband applications, in the wireless data and digital PMR markets. Receiver Transmitters Transceivers Glossary
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DVI2PAR - a video HDMI/DVI decoder for the beagleboard Support this project: or send me something from my Amazon wishlist. From the day i received my beagleboard rev. B7 i was missing an easy way to use the digital video interface with a small LCD screen. This page describes a cheap and simple yet flexible HDMI to parallel 3.3v interface. The beagleboard running Maemo5 on a 7" 800x480 TFT The hardware The hardware is rather simple and doesn't consist of much more than the TFP101A panel link receiver from TI. The schematic The printed circuit board Obtaining the parts The main components is the TFP101A. Attaching the dvi2par to the display The dvi2par is meant to directly interface to the LCD board. The dvi2par mounted on top the displays old controller pcb Also visible in this picture is the fact that only the upper 6 of the 8 color bits available on the dvi2par are being used. EDID/DDC support The archive contains some scripts (prom.sh) and a tool (eeprom.c) to write the ddc data to the eeprom using the depicted i2c-tiny-usb setup. Downloads Links
Chart Porn Software Defined Radio for Mariners: Weather Satellites - Antennas Summary: two meters of wire and a meter of coax for a good antenna, 5 meters of wire and a wood frame for an excellent antenna. Cost is less than 10 euros, construction time is maximum one hour for the example here.Read on to find out how. Your antenna choices for Weather Satellites are: 1. Materials Wire - the thicker the better. I've built and tested different versions of the following antennas, best performance with easiest construction is discussed here. Portable Turnstile Built and tested six different versions, received the image on the right with the version below. Wire - Cut four (4) 55 cm wire. If it is foam (same material as a coffee cup, soft to the touch) you need 43 and 86 cm long cables. Assembly Mount the four terminals at 90 degrees to each other, like North, East, South and West on the compass rose. Congratulations, now you have a turnstile antenna! Transform this to an eggbeater antenna: QFH, the Spiral antenna Frame support: Your choice. Dimensions Support / Frame
From Capitalism To Democracy Software Defined Radio for Mariners: Review: LNA4All Antenna Amplifier Summary: buy one, works as advertised. What is it? A small electronic device making radio signals 100-150 times stronger. Officially called a low-noise amplifier, LNA for short. Costs 25 euros delivered, helps you hear and see more targets of interest. Why? - To run the RTLstick with less gain, - To get the maximum from your antennas, - To add range to your reception ability. Testing setup Commercial radio, airplane speech, Weather satellite signals, AIS and airplane position signals are tested. Commercial radio / Upconverter range Signal strength increase as promised. Airband Performance slightly better than expected. Airplane chatter between Plane and Approach/Tower/Ground comes booming in, much better audio, pilot seems talking to you. Weather Satellites / NOAA APT reception Signals are visibly stronger in the waterfall display (quickly connected the LNA during a recent pass), less banded noise in images, same noise floor requires less gain in SDRSharp. Marine Band / AIS What you get
Reino Unido quiere implantar “cajas negras” que permitan espiar a los ciudadanos en la red La privacidad de los usuarios en el Reino Unido está en entredicho con el controvertido proyecto de ley que se debate en el Parlamento de Londres. De aprobarse, la ley permitirá que el Gobierno acceda a todo lo que se escribe y publica en la red. Mientras las autoridades hablan de un proyecto de ley sobre comunicación y datos que identifique diferentes tipos de crímenes, los críticos y defensores de derechos temen que el proyecto de ley sea capaz de crear un régimen totalitario online en el país. ¿Y cómo? Mientras, el Ministerio de Interior del Reino Unido dice que sólo se recopilará información y datos sobre el remitente y el destinatario pero no el contenido de la comunicación. Los primeros en hablar sobre el el peligro de esta regulación han sido activistas y defensores de la privacidad, quienes temen que la propuesta pase por encima de las libertades personales sin proporcionar la seguridad que se asegura. Tal y como está escrita, le da al gobierno un poder demasiado amplio.
Tutorial: Cheap ADS-B Aircraft RADAR The RTL-SDR can be used as a super cheap real time air radar. Modern planes use something called an ADS-B (Automatic Dependent Surveillance-Broadcast) Mode-S transponder, which periodically broadcasts location and altitude information to air traffic controllers. The RTL-SDR can be used to listen to these ADS-B signals, which can then be used to create your very own home aircraft radar system. Compared to dedicated commercial ADS-B receivers which can go for between $200 – $1000, the $20 RTL-SDR is very attractive for the hobbyist in terms of price. ADS-B broadcasts at a frequency of 1090 MHz. We also now note that recently new higher end SDR’s like the $199 Airspy have developed very good ADS-B receivers that are several times more sensitive that the RTL-SDR. Examples of RTL-SDR used as an ADS-B air radar In this video, YouTube user Superphish shows a timelapse of air traffic over New Zealand using RTL-SDR, ADSB# and Virtual Radar Server. A working RTL-SDR dongle. ADS-B Antennas dump1090
The Shadow Superpower - By Robert Neuwirth With only a mobile phone and a promise of money from his uncle, David Obi did something the Nigerian government has been trying to do for decades: He figured out how to bring electricity to the masses in Africa's most populous country. It wasn't a matter of technology. David is not an inventor or an engineer, and his insights into his country's electrical problems had nothing to do with fancy photovoltaics or turbines to harness the harmattan or any other alternative sources of energy. Instead, 7,000 miles from home, using a language he could hardly speak, he did what traders have always done: made a deal. He contracted with a Chinese firm near Guangzhou to produce small diesel-powered generators under his uncle's brand name, Aakoo, and shipped them home to Nigeria, where power is often scarce. David's deal, struck four years ago, was not massive -- but it made a solid profit and put him on a strong footing for success as a transnational merchant. I like the phrase. We should be too.
Tutorial: Receiving Weather Balloon (Radiosonde) Data with RTL-SDR Around the world meteorological weather balloons are launched twice daily, and continuously transit weather telemetry to a ground station using something called a radiosonde. The RTL-SDR software defined radio combined with a decoding program can be used to intercept this telemetry, and display it on your own computer. You will be able to see real time graphs and data of air temperature, humidity, pressure as well as the location and height of the balloon as it makes it’s ascent. Note that currently, this won’t work in the USA, as there are no decoding programs available for use with the telemetry protocol used in the states. This tutorial is also applicable to other software defined radios such as the Funcube dongle, HackRF, BladeRF or even hardware radios with discriminator taps, but the RTL-SDR is the cheapest option that will work. Examples In this example YouTube user Superphish shows a radiosonde being received and decoded using a RTL-SDR, SDRSharp and SondeMonitor. Tutorial Antennas
U.K. spy chief sees 'disturbing' volume of cyberattacks | Security A significant but unsuccessful cyberattack was launched on the U.K. Foreign Office and other government departments this summer, according to the head of the country's communications spy agency. Iain Lobban, director of the U.K.'s Government Communications Headquarters, wrote today in a piece for The Times, based in London, that there was a "disturbing" volume of e-crime and attacks on government and industry systems. "I can attest to attempts to steal British ideas and designs--in the IT, technology, defence, engineering and energy sectors as well as other industries--to gain commercial advantage or to profit from secret knowledge of contractual arrangements," Lobban wrote.